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Spin-off of Distribution Business - Additional Information (Detail) - Now Inc [Member] $ in Millions			12 Months Ended
	May. 30, 2014 USD ($)	May. 22, 2014	Dec. 31, 2014 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ratio of common stock sharing		4
Other costs			$ 36
Sales prior to the spin-off	$ 231
Purchases prior to the spin-off	$ 82

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- Definition

For a disposal group that is a component of the entity (discontinued operation), in the period in which the operations are initially classified as discontinued, the amounts of intercompany costs that were previously eliminated in consolidation for periods before the disposal transaction (in situations where revenue and cost producing activities with the disposed component will continue after disposal).

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- Definition

For a disposal group that is a component of the entity (discontinued operation), in the period in which the operations are initially classified as discontinued, the amounts of intercompany revenue that were previously eliminated in consolidation for periods before the disposal transaction (in situations where revenue and cost producing activities with the disposed component will continue after disposal).

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No definition available.

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- Definition

Share Exchange Ratio In Spin Off

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- Definition

Spinoff Related Transaction Costs

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Details

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